Oklahoma Democratic Rep. Dan Boren won’t say if he supports Attorney General Eric Holder amid a surge in the number of House members who have demanded Holder’s resign over Operation Fast and Furious.

A spokesperson for Boren, a conservative Democrat who is a member of the Blue Dog Coalition, said the congressman had “no comment” on whether he still has confidence in Holder.

This is the first time a Democrat has openly refused to support Holder as 120 congressmen, three senators, two sitting governors and all major GOP presidential candidates demand his resignation.

Boren was one of 31 Democrats who signed a letter to President Barack Obama on June 3, 2011, asking him to direct the Justice Department and Holder to provide all information and documents related to Fast and Furious to congressional investigators.

Obama and Holder have apparently ignored the request from Boren and his colleagues, and are still withholding more than 70,000 pages of lawfully subpoenaed documents from House oversight committee chairman Darrell Issa and Iowa Sen. Chuck Grassley. Holder has, however, provided the documents to the DOJ’s internal Office of the Inspector General.

The other 30 Democrats who signed that letter did not immediately respond to TheDC’s requests for comment.

House Minority Leader Nancy Pelosi also didn’t immediately respond to a request for comment about whether she continues to have confidence in Holder. It’s unclear if she does.

The Obama administration’s Fast and Furious “gun-walking” program — organized by the Bureau of Alcohol, Tobacco, Firearms and Explosives and overseen by the Department of Justice — sent thousands of weapons to Mexican drug cartels via straw purchasers, or people who purchased guns in the United States with the intention of illegally trafficking them somewhere else.

At least 300 people in Mexico were killed with weapons provided by Fast and Furious, as was U.S. Border Patrol agent Brian Terry. The identities of the Mexican victims are unknown. Allegations are now surfacing that Immigration and Customs Enforcement agent Jaime Zapata was also murdered with weapons the Obama administration allowed to “walk” into the hands of drug cartel members.